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Environ Sci Pollut Res Int. 2017 Apr;24(10):9079-9088. doi: 10.1007/s11356-016-6756-4. Epub 2016 May 10.

Monitoring and assessment of heavy metal contamination in a constructed wetland in Shaoguan (Guangdong Province, China): bioaccumulation of Pb, Zn, Cu and Cd in aquatic and terrestrial components.

Author information

1
Department of Biology, Hong Kong Baptist University, Hong Kong, SAR, China.
2
Department of History, Hong Kong Shue Yan University, Hong Kong, SAR, China.
3
Upper Iowa University, 605 Washington St, Fayette, IA, 52142, USA.
4
Department of Geoscience & Geography, New Jersey City University, Jersey City, NJ, 07305, USA.
5
Department of Biotechnology, Vignan's University (VFSTRU), Vadlamudi, 522213, India.
6
Institute of Vocational Education, Hong Kong Vocational Training Council, Hong Kong, SAR, China.
7
School of Science and Technology, The Open University of Hong Kong, Hong Kong, SAR, China.
8
Division of Science and Technology, United International College, Beijing Normal University-Hong Kong Baptist University, E-407A, 28 Jinfeng Road, Tangjiawan, Zhuhai, GD, 519085, China.
9
State Key Lab of Biocontrol, Sun Yat-sen University, Guangzhou, Guangdong Province, People's Republic of China. lssyzhh@mail.sysu.edu.cn.
10
School of Life Science, Sun Yat-sen University, Guangzhou, Guangdong Province, People's Republic of China. lssyzhh@mail.sysu.edu.cn.
11
Department of Biology, Hong Kong Baptist University, Hong Kong, SAR, China. kklyung@hkbu.edu.hk.
12
Department of Biology, University of North Carolina, Greensboro, NC, 27402, USA. tmtsui@uncg.edu.

Abstract

The objective of this study is to evaluate the current status of heavy metal concentrations in constructed wetland, Shaoguan (Guangdong, China). Sediments, three wetland plants (Typha latifolia, Phragmites australis, and Cyperus malaccensis), and six freshwater fish species [Carassius auratus (Goldfish), Cirrhinus molitorella (Mud carp), Ctenopharyngodon idellus (Grass carp), Cyprinus carpio (Wild common carp), Nicholsicypris normalis (Mandarin fish), Sarcocheilichthys kiangsiensis (Minnows)] in a constructed wetland in Shaoguan were collected and analyzed for their heavy metal compositions. Levels of Pb, Zn, Cu, and Cd in sediments exceeded approximately 532, 285, 11, and 66 times of the Dutch Intervention value. From the current study, the concentrations of Pb and Zn in three plants were generally high, especially in root tissues. For fish, concentrations of all studied metals in whole body of N. mormalis were the highest among all the fishes investigated (Pb 113.4 mg/kg, dw; Zn 183.1 mg/kg, dw; Cu 19.41 mg/kg, dw; 0.846 mg/kg, dw). Heavy metal accumulation in different ecological compartments was analyzed by principle component analysis (PCA), and there is one majority of grouped heavy metals concentration as similar in composition of ecological compartment, with the Cd concentration quite dissimilar. In relation to future prospect, phytoremediation technology for enhanced heavy metal accumulation by constructed wetland is still in early stage and needs more attention in gene manipulation area.

KEYWORDS:

Heavy metals; Phytofiltration; Shaoguan; Typha latifolia; Wetland

PMID:
27164879
DOI:
10.1007/s11356-016-6756-4
[Indexed for MEDLINE]

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